Sandstone
Arenite (Sedimentary Rock)
sedimentary
Category
Mineral_rock
Browse mineral_rock specimens identified by the Rock Identifier community.
Learn about Mineral_rock in the encyclopedia
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Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Black Tourmaline
Schorl (NaFe2+3Al6(Si6O18)(BO3)3(OH,F,O)4)
mineral
Red jasper
Jasper (microcrystalline quartz, SiO₂), iron-oxide-rich variety
mineral
Tumbled Yellow Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Fossilized Bone
Fossilized Vertebrate Bone (Per mineralized)
fossil
Quartz
Silicon Dioxide (SiO2)
mineral
Red Siltstone
Siltstone (composed of Quartz and Clay minerals)
sedimentary
Chalcedony
Silicon Dioxide (SiO2)
mineral
Green Quartz (Aventurine or Prase)
Silicon Dioxide (SiO2) with inclusions
mineral
Fossilized Bone Fragment
Vertebrate Fossil
fossil
Granite
Granite
igneous
Serpentinite
Serpentinite (complex silicate minerals including lizardite, chrysotile, and antigorite: (Mg,Fe)3Si2O5(OH)4)
metamorphic
Granodiorite (River Cobble)
Granodiorite (contains Quartz, Plagioclase Feldspar, Biotite Mica)
igneous
Gneiss
Gneiss
metamorphic
Basalt (Black Beach Pebble)
Basalt
igneous
Quartz (Iron-stained Quartz)
Silicon Dioxide (SiO2)
mineral
Carnelian
Carnelian (Silicate mineral, SiO2)
mineral
Gabbro (Indigo Gabbro)
Gabbro (mafic intrusive igneous rock)
igneous
Pink Granite
Phaneritic Felsic Igneous Rock (Granite)
igneous
Serpentinite
Serpentinite (group of minerals: Antigorite, Lizardite, Chrysotile)
metamorphic
Weathered greenish rock fragment
Indeterminate; possibly epidote- or chlorite-bearing altered silicate rock
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Amethyst
Quartz (SiO2)
mineral
Quartz with Feldspar and Mica (Pegmatite Fragment)
Granitic Pegmatite
igneous
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Chalcedony Nodule / Agate
Silicon Dioxide (SiO2)
sedimentary
Pegmatite (Quartz and Feldspar)
Igneous Pegmatite containing SiO2 and KAlSi3O8
igneous
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Amethyst
Quartz (SiO2)
mineral
Raw Topaz (or Smoky Quartz)
Al2SiO4(F,OH)2 / Silicon Dioxide (SiO2)
mineral
Himalayan Salt Lamp
Halite (NaCl) with trace impurities
mineral
Imperial Topaz
Aluminum silicate fluoride hydroxide (Al2SiO4(F,OH)2)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Ferruginous Quartz
Silicon Dioxide (SiO2) with Iron Oxide (Limonite/Hematite)
mineral
Tanzanite
Blue Zoisite (Ca2Al3(SiO4)3(OH))
gemstone
Quartz with inclusions (likely Tourmaline or Biotite)
Silicon Dioxide (SiO2)
mineral